But i see that Infinispan Server installation can serve as a Remote Data Grid, so is the REST interface included in the server installation with the latest release?
We will be talking about this: https://github.com/infinispan/infinispan-server Answer is, I'd say, yes. When you will use Infinispan Server, you will have possibility of accessing Infinispan cache via REST endpoint. (see readme + see endpoint subsystem in, for example, standalone.xml configuration file) After start of this standalone server you can connect to http://127.0.0.1:8080/ (REST server)
and start using it according to the rules described in the documentation.
What server is it running on ?
The whole Infinispan server is very based on JBoss AS. Imagine "big" JBoss AS minus all unnecessary systems, subsystems and functionality. This "little boy" is Infinispan Server which, for example, doesn't support deploying applications etc.
Do we need licence to run the Server on enterprise level?
No. This is open source project. If you still looking for "officially" supported version, I'd suggest you to check Red Hat's JBoss Data Grid solution, which is productized and supported Infinispan + Infinispan Server. See http://www.redhat.com/products/jbossenterprisemiddleware/data-grid/
What is the good way to deploy it in any other Application Server?
There is no such a way. As I mentioner earlier, Infinispan Server itself is standalone server which already contains everything you need for caching and running cluster of virtually 128 (or even more) nodes.
Any help will be highly appreciated?
Maybe. I can't answer this question properly :(